How can I use Rhino as a viewer only?

In order to use Rhino as a viewer, you will need an evaluation license key. If you already have one and it’s expired, this is perfect for this purpose. If you don’t have any evaluation license, key, ask one on https://www.rhino3d.com/download/rhino/evaluation

When validating your evaluation license, don’t choose the option to Share or Float the license between computers, be sure to choose the option to Lock the license on the computer.

In case you already have a license and it’s on the CloudZoo, you will have to remove it from your Rhino account first:

1. Go to https://accounts.rhino3d.com/ and login to your account with your email.
2. Scroll down to the bottom of the page and click on Licenses and on your name under Personal Licenses.
3. Once removed, launch Rhino 8 again.
4. When requested to enter a new license choose “Enter your license key” option and type your evaluation license key then click Continue. Make sure that you DO NOT choose the option to “Add To Your Rhino Account” and click on the “Use only on this computer” option on the bottom left and click Yes.

As long as your Rhino Evaluation license is valid, you will be able to save your work, when it is expired, you will be able to open any Rhino model, change the view, use dimensions, etc. but won’t be able to save any file.